Printing-press.



W. F. S. PERRY.

PRINTING PRESS.

APPLICATION FILED APB..5,1909.

Patented Dec. 14, 1999. 2 SHEETS-SHEET 1.

atkwnu Witnesses a fl/z ln/ Kim W. F. S. PERRY PRINTING PRESS.APPLIGATIOI; FILED APR.5,1909.

2 SHEETS-SHEET 2.

37/ m w w Patented Dec. 14, 1909 j 4 few l Vi humus i mv UNITED srairrsPATENT orrrcn.

WILLIAM F. S. FERRY, OF PHILADELPHIA, PENNSYLVANIA.

PRINTING-PRESS.

Patented Dec. 14, 1909.

Original application filed July 15, 1908, Serial No. 443,694. Dividedand. this application filed April 5, 1909. Serial No. 487,994.

To all whom it may concern:

Be it known that 1, WILLIAM F. S. FERRY, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improvements inPrinting-Presses, (the same being a division of my application, SerialNo. 443,694, filed July 15, 1908,) of which the following is aspecification.

This invention consists of a novel construction of printing machines ofthat general type in which the impression cylinder makes two revolutionsfor each impression, the essential object of the invention being tosecure a machine which may be run at a greater speed than machines of asimilar type at present in use, requiring less power for operation andwhich possesses many advantages from a practical standpoint as willappear more fully hereinafter.

In carrying out the construct-ion of the two revolution printing presscomprising the present invention, a form cylinder, or rotary bed, issubstituted for or used instead of the flat bed, track, bed motion,gears, and other parts such as used on the common flat bed press, saidform cylinder being arranged directly under the impression cylinder andthe operation of the two cylinders being properly timed so that thecylinders will move together to accomplish the printing operation in theactual use of the machine.

For a full understanding of the invention, reference is to be had to thefollowing detail description, and to the accompanying drawings, in whichFigure 1 is a side elevation of a rotary printing press embodying theessential features of the invention; Fig. 2 is a vertical longitudinalsectional view, showing in a diagrammatic way most clearly the peculiarformation of the peripheral portion of the form and impression cylinder,and Fig. 3 is a detail View of the eccentric portion by which theimpression cylinder is depressed against the tension of the liftingsprings and in order to cooperate with the form cylinder.

Throughout the following detail description and on the several figuresof the drawings similar parts are referred to by like referencecharacters.

Referring particularly to the drawings and describing the specificconstruction the numeral 1 designates the impression cylinder and thenumeral 2 the form cylinder, both of these cylinders being mounted uponshafts in the customary way and also being journaled in boxes supportedby the sides of the frame 3 of the machine. The form cylinder boxes 4are rigidly supported in the frame 3 and space rods 5 extend througheach of the boxes 4 being secured at their upper ends to the adjacentimpression cylinder box 6. A pair of rods 5 is employed for each box 6and said rods are movable vertically through the adjacent box 4 in orderthat the impression cylinder 1 may be carried from not acting tooperating position with respect to the form cylinder 2. The pairs ofrods 5 are connected at the lower ends thereof by blocks 7 and peculiareccentric operating devices shown in Fig. 3 of the drawing are utilizedto depress the blocks 7 in order to lower or depress the impressioncylinder during the printing operation. The eccentric motion will bedescribed more clearly hereinafter. The impression and form cylindersare geared together and operated from a drive shaft 10, and theimpression and form cylinder gears are designated 11 and 12respectively. The springs 9 elevate the cylinder 1 at proper time. It iscontemplated that the plates of the form cylinder be secured thereto inany suitable manner, this feature not forming a part of the presentinvention.

The impression cylinder 1 is provided with the usual grippers 13 carriedby the gripper rod 14 and adapted to take the sheet from the feed table15 in the customary way, the opening and closing of the grippers 13,however, being controlled by peculiar operating mechanism for theopening and closing pin which cooperates with the tumbler carried uponan end of the gripper rod 14. The gripper pin mechanism not forming apart of this mechanism will not be specifically described.

Both the impression and form cylinders are provided in the peripheralportions thereof with recesses or depressions 61 of peculiar form, saiddepressions ext-ending along about one-third of the circumferencecylinder. During the rotation of the cylinders 1 and 2, as the cylinder1 is depressed, the recesses 61 are adjacent to one another. During thefurther revolution of the cylinder the ends of the depression 61, whichare formed so as to decline slightly as shown at 61 ride into contactwith one another just before the plates of the form cylinder cooperatewith the impression cylinder to print the sheet which is fed betweensaid cylinder. Hence the inclined ends 61 of the depressions 61virtually constitute cams causing the gradual contact of the operatingsurfaces of the cylinders 1 and 2, said cylinders being tight togetherby the time the sheet reaches the plate of the form cylinder. Theprovision of the depressions 61 makes the machine run much easierreducing the pull on the cylinders in a manner which is readily evident.The present machines can be run without mechanical injury or jar to thepress or building in which it is located, the usual heavy flat bed notbeing employed and space being conse piently economized. The machine mayof course be fed by hand or automatically, this being immaterial to theinvention and it can be operated at a speed of from five hundred tothirty-five hundred impressions an hour. The form is rolled twice duringeach impression and this gives more light to the color in printing anddecreases the pull on the press and rollers for the form requirescontinual flow of ml: which it does not receive 011 the fiat bedcylinder presses. The present machine em bodies, furthermore, severalother advantages with reference to the construction and operation butthe same are not set forth other than generally herein.

Reverting again to the operation of the impression cylinder by thepeculiar eccentric motion illustrated in Fi 3 it ma 1 be observed thatas the shaft 8 carrying the eccentric is given partial rotary movementby means of cam wheels 8", the impression eylinder 1 is lowered intocooperation with the form cylinder, and elevated at the proper time bymeans of the lifting springs 9. The operation of the eccentric or cammotion 8 is governed by suitable controlling means and which permit ofthrowing the eccentric into and out of operation under actual workingconditions, and the rise or fall of the impression cylinder may be thuscontinued or discontinued at will.

The present machine is of course provided with suitable inking mechanismas well as sheet feeding and delivery mechanisms.

Having thus described the invention, what is claimed as new is:

In a printing press, in combination a form cylinder, an impressioncylinder mounted above the form cylinder, lifting springs, supportingthe impression cylinder, boxes in which the form cylinder is journaled,impressing rods connected with the impression cylinder and passingthrough the boxes of the form cylinder, means for exerting a downwardpull on the said rods to lower the impression cylinder into operativerelation to the form cylinder, the form and impression cylinders beingprovided in the peripheral portions thereof with matching depressions orrecesses, ends of which are inclined to the larger peripheral portions,the

said depressions being caused to approach one another just before theprinted sheet reaches the form, and inking mechanism.

lin testimony whereof I atlix my signature in presence of two witnesses.

lVILLIAM F. S. FERRY. Vitnesses:

linivuy K. Finns, T. E. Consuls.

